| 摘要 |
PURPOSE: A vertical reinforcing bar-cum-steel vertical lagging for a form and an underground external wall is provided to reduce the unnecessary pit excavation and re-filling degrees by resisting earth pressure and functioning a form when placing concrete, and to prevent an accident at construction work by excluding formwork in a narrow space. CONSTITUTION: A vertical reinforcing bar-cum-steel vertical lagging for a form and an underground external wall is formed by corresponding the outer boundary line of a wall of an underground structure with the inside of an H-beam(4) before underground excavation work and installing H-beams vertically at regular intervals and then excavating the ground, installing a steel vertical lagging(1) between the H-beams, and supporting and fixing the steel vertical lagging by a steel vertical lagging support structure which is composed of a horizontal member(2) and vertical and longitudinal free move connector(3). |
